I just re-registered (lost my login and e-mail years ago), but been lurking here for 10 years

I don't know, if I'm able to share links with my first post, but thought this would be a good way to get started and help others on their synthesis path. I made this poster you can print in HiRes (up to A0 format), showing all the basic concepts. You can see my Insta account in the poster, if you would like to follow be for synth insights and of course #gearporn

Nice work. Very useful to point at when trying to explain some basic synthesis concepts.

The FM bit is hard to catch in one picture. But this one ignores the "reflection" of "negative" frequencies back into the spectrum as phase inverted sines which can partially or fully phase cancel amplitudes of normal phased partials/sidebands in the spectrum. And off course the amount of modulation, causing more sidebands.

The reflected phase inverted sidebands are depicted as having a negative amplitude. Hanging instead of standing. The resulting amplitudes of partials/sidebands is the absolute sum of the positive and negative partials.